CRF230, What to look for when buying 2nd hand.

Hi there Wild Dogs, I am nearly ready to start looking for a crf230 to get around the farm and also for a bit of fun. I currently use a xr125l so I'm not familiar with the crf. Please could those Dogs with experience tell me what to look out for or check when looking at a used crf230. Also what other bikes in that class could I consider? I'm about 1.6m and 63kg.

Thanks chaps, love being part of this forum!